Home / 3,111.21-4,666.64-1,379.25

Finding the Fourth Proportional to 3,111.21, 4,666.64 and 1,379.25

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Solution

The fourth proportional to 3,111.21, 4,666.64 and 1,379.25 is: 2,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.21 : 4,666.64 = 1,379.25 : x
  2. Step 2: Convert to fraction form
    3,111.21/4,666.64 = 1,379.25/x
  3. Step 3: Cross multiply
    3,111.21x = 4,666.64 × 1,379.25
  4. Step 4: Simplify right side
    3,111.21x = 6,436,456.32
  5. Step 5: Solve for x
    x = 6,436,456.32/3,111.21
  6. Step 6: Final answer
    x = 2,068.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.